Journal of the Geothermal Research Society of Japan
Online ISSN : 1883-5775
Print ISSN : 0388-6735
ISSN-L : 0388-6735
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Volume 17, Issue 2
Displaying 1-3 of 3 articles from this issue
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  • Formulation for the Coupled Mechanical-Hydraulic-Thermal Behavoir Analysis in a Discontinuous Rock Mass (Coupled Analysis)
    Yoshihiko NAKAI, Ryoukichi HAMAJIMA
    1995 Volume 17 Issue 2 Pages 95-109
    Published: April 25, 1995
    Released on J-STAGE: August 07, 2009
    DOIhttps://doi.org/10.11367/grsj1979.17.95
    JOURNAL FREE ACCESS
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    In rock masses, discontinuities of faults, joints, etc. exist and exert large influences on the mechanical property of rock masses. In the coupled problems of heat transfer, seepage flow and stress in discontinuous rock masses, analysis was made in this study, on the stress balance using the modified virtual displacement method and on the mass conservation and energy conservation laws using the integrated finite difference method. And it was made in consideration of the effective stress and the change of rock porosity and fluid properties. This paper describes a new numerical method and the simulation of the consolidation.
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  • Experimental study on temperature dependence of resistivity of dried rocks.
    Toyohisa FUJITA, Yasuhiro FUJIMITSU, Satoshi AKIBAYASHI, Hiroyuki KOSU ...
    1995 Volume 17 Issue 2 Pages 111-121
    Published: April 25, 1995
    Released on J-STAGE: February 05, 2010
    DOIhttps://doi.org/10.11367/grsj1979.17.111
    JOURNAL FREE ACCESS
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    Resistivities have been measured on three pieces of dried boring rock cores at temperture ranges from 373K to 673K, in an air atmosphere. The resistivities and a dielectric constant that corrects the resistivities have been measured by putting a cylindrical rock piece between two electrodes. The results are as follows, 1) The resistivities of three pieces of rocks decrease as their temperatures rise. 2) The resistivity of each rock shows hysteresis. One of the reasons is that magnetite in the rock has changed into hematite. This change has been ascertained by observation of X-ray diffraction and magnetization. 3) Revised resistivity value by dielectric polarization is approximately half of the measured one. If resistivities of many kinds of minerals are measured, we can roughly estimate the dried rock resistivity by measuring the ratio of mineral components in the rock and the wet rock resistivity by measuring a resistivity of solution in the rock separately.
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  • Abstracts of Papers Submitted for the Annual Meeting of the Society
    1995 Volume 17 Issue 2 Pages 123-168
    Published: April 25, 1995
    Released on J-STAGE: August 07, 2009
    DOIhttps://doi.org/10.11367/grsj1979.17.123
    JOURNAL FREE ACCESS
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